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Prony state space algorithm-based impedance spectrum measurement method and tester

A technology of state space and measurement method, applied in the direction of measurement device, measurement of electrical variables, measurement of resistance/reactance/impedance, etc., can solve the problem of inability to measure the impedance spectrum of the signal, and achieve the measurement of the impedance spectrum and the high performance of the impedance spectrum. The effect of measurement, good practicality

Inactive Publication Date: 2018-08-14
QINGDAO NAT LAB FOR MARINE SCI & TECH DEV CENT +1
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Problems solved by technology

However, neither the tester based on the frequency sweep method nor the Fourier method can measure the impedance spectrum with a very short-term signal.

Method used

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  • Prony state space algorithm-based impedance spectrum measurement method and tester
  • Prony state space algorithm-based impedance spectrum measurement method and tester
  • Prony state space algorithm-based impedance spectrum measurement method and tester

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] The tester of the present invention is a device based on the improved Prony algorithm, which uses transient time domain signals to obtain impedance spectrum in one measurement. Such as figure 1 As shown, the impedance spectroscopy tester based on the Prony state space algorithm includes two measurement ports 1-1, 1-2, a signal generator 2, a sampling resistor 3, a signal collector 4 and a central control computer 5, and the measurement port 1- 1 One end is connected to the measured object, the other end is connected to the signal generator 2, the signal generator 2 is connected to the sampl...

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Abstract

The invention belongs to the impedance spectrum measurement technological field and relates to a Prony state space algorithm-based impedance spectrum measurement method and tester. According to the Prony state space algorithm-based impedance spectrum measurement method and tester, a state space equation is introduced into an algorithm, so that the problem of solving a higher-order function in a traditional Prony method is solved, and therefore, the method, capable of replacing a Fourier method, can be applied to practical engineering; and the method can obtain an accurate impedance spectrum byusing test signals obtained in a short time in one-time measurement, can avoid the problems of frequency leakage and frequency mixing, and has an excellent noise cancellation effect.

Description

technical field [0001] The invention relates to the technical field of impedance measurement, in particular to an impedance spectrum measurement method and a tester based on a Prony state space algorithm. Background technique [0002] The impedance spectrum tester is an instrument used to measure the impedance characteristics of components. The working characteristics of many components, such as modal frequency, damping, bandwidth, operating point, etc., can be obtained from the impedance spectrum. In the actual impedance spectrum measurement process, due to the characteristics of the measured object and the measurement environment, the time length of the obtained measurement signal is often relatively short and interfered by noise. For example: when measuring the impedance spectrum of a transducer in a pool, If the signal is measured for a long time, the results of the impedance spectrum will be seriously affected by the multipath effect, resulting in large errors. Therefor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/14
CPCG01R27/14
Inventor 苏亮李华军杨照胡少龙武国相辛俊峰贾东宁桂琳
Owner QINGDAO NAT LAB FOR MARINE SCI & TECH DEV CENT
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